CN103835984A - High-order rotational distortion generator with demountable disturbing rods - Google Patents
High-order rotational distortion generator with demountable disturbing rods Download PDFInfo
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- CN103835984A CN103835984A CN201410080218.2A CN201410080218A CN103835984A CN 103835984 A CN103835984 A CN 103835984A CN 201410080218 A CN201410080218 A CN 201410080218A CN 103835984 A CN103835984 A CN 103835984A
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Abstract
The invention discloses a high-order rotational distortion generator with demountable disturbing rods and belongs to the technical field of turbomachinery. The high-order rotational distortion generator with demountable disturbing rods comprises a rotating disc, a plurality of disturbing rods, a balance device and a drive motor. The inner ring of the rotating disc is a projection connected with the drive motor. The balance device is mounted on the middle ring of the rotating disc. The outer ring of the rotating disc is provided with a plurality of threaded holes. The disturbing rods are mounted on the threaded holes in a demountable manner. The disturbing rods and the rotating disc are connected in a demountable manner, so that high-order rotational distortions different in peripheral range and distributing group number can be generated to meet various experimental requirements; a weight device which is demountable is disposed on the rotating disc to adjust static balance of the generator, so that the high-order rotational distortion generator with demountable disturbing rods can operate at high rotational speed.
Description
Technical field
The present invention relates to a kind of flow-disturbing bar type high-order rotational distortion generator, is specifically a kind of detachable flow-disturbing bar type high-order rotational distortion generator, belongs to impeller machinery technical field.
Background technique
Inlet distortion is one of key factor of bringing out gas compressor flow unstable, and it has greatly limited performance and the stable operation range of aero-engine compressor.Modern aero gas turbine engine extensively adopts the structure of twin shaft or multiaxis, and the aeroengine of this structure exists the problem that influences each other between high and low pressure gas compressor, especially on perf ormance separately or the impact of stability margin.In the aero gas turbine engine of multiaxis structure, in the time that upstream gas compressor rotates stall, the stall of circumferentially propagating is rolled into a ball meeting with main flow propagates down stream, thereby downstream gas compressor is operated under a kind of special inlet flow field, is referred to as rotating inlet distortion.
At present, one of research rotating inlet distortion technical way on Compressor Stability impact is exactly to be rotated inlet distortion test both at home and abroad, and the key of test is to simulate the rotating inlet distortion of compressor inlet, because the gas compressor that can not place a true rotating stall at compressor inlet in experiment produces rotating stall.In order to study rotating inlet distortion, the impact of Compressor Stability is needed to change the rotating speed, intensity of inlet distortion, circumferentially scope, disturbance group number etc., to simulate the real stall unity of upstream gas compressor structure.
Present stage, conventional rotating inlet distortion simulation device had two kinds: (1), rotational distortion net.Be made up of support, holder net, base net and subsides net, wherein pasting net has different specifications and shape, can accomplish to change distortion intensity and distortion district scope.Owing to there being the disturbing factors such as support, the pressure waveform producing after the rotation of distortion net is more mixed and disorderly, under different rotating speeds, can not maintain identical waveform, just can not get rid of the impact of waveform when experiment.The shortcoming of this structure maximum is that intensity is poor, and rotating speed can not be too high, disintegrates once the rotation of distortion net, after suction gas compressor experimental piece, will cause a serious accident.Therefore, rotational distortion net can only use under slow-speed of revolution condition, has greatly limited its application in experiment.(2), flow-disturbing bar type simulator.Calendar year 2001, Thomas Peters, Thomas Burgener and Leonhard Fottner publish thesis " EFFECTS OF ROTATING INLET DISTORTION ON A 5-STAGE HP-COMPRESSOR " on ASME TURBO EXPO 2001, have designed a kind of flow-disturbing bar type rotational distortion simulator.It is made up of rotating disc and the flow-disturbing rod that is fixed thereon, and flow-disturbing rod covers the scopes of circumferential 120 degree, and the cross section of every flow-disturbing rod is the square of length of side 5mm.This kind of rotational distortion simulator can be worked under high rotating speed, but owing to having adopted integral type structure between flow-disturbing rod and rotating disc, non-dismountable, therefore can only simulate some strength, the circumferentially rotational distortion of single group of scope, the distortion of generation also can be upset in square cross section in addition.
Summary of the invention
Technical problem to be solved by this invention is to overcome prior art defect, and a kind of detachable flow-disturbing bar type high-order rotational distortion generator of the rotating inlet distortion that can simulate different circumferentially scopes, varying strength, different disturbance group number is provided.
In order to solve the problems of the technologies described above, the invention provides a kind of detachable flow-disturbing bar type high-order rotational distortion generator, comprise rotating disc, some flow-disturbing rods, Equilibrator and motors, the inner ring of described rotating disc is the boss being connected with drive motor, described Equilibrator is arranged on the centre circle of rotating disc, the outer ring of described rotating disc is provided with several tapped holes, and described some flow-disturbing rods are arranged on tapped hole with removably.
In detachable flow-disturbing bar type high-order rotational distortion generator of the present invention, described flow-disturbing rod comprises active section and linkage section, and described linkage section is provided with for the screw thread in connecting thread hole and the boss of location.
In detachable flow-disturbing bar type high-order rotational distortion generator of the present invention, the active section cross section of described flow-disturbing rod is circular.
In detachable flow-disturbing bar type high-order rotational distortion generator of the present invention, described Equilibrator comprises balance slide block and balancing weight, described balance slide block is arranged on rotating disc centre circle along in the slide rail circumferentially distributing, and described balancing weight is arranged on the counterweight tapped hole between slide rail outside and the outer ring of rotating disc.
In detachable flow-disturbing bar type high-order rotational distortion generator of the present invention, described balance slide block comprises the first slide block and the second slide block, and the second slide block is placed in slide rail, and the first slide block socket is fixed on the second slide block.
In detachable flow-disturbing bar type high-order rotational distortion generator of the present invention, between the inner ring of described rotating disc and centre circle, be provided with several lightening holes.
In detachable flow-disturbing bar type high-order rotational distortion generator of the present invention, also comprise with removably and be arranged on the plug on the tapped hole of rotating disc outer ring.
In detachable flow-disturbing bar type high-order rotational distortion generator of the present invention, described plug is identical with the linkage segment structure of flow-disturbing rod.
Beneficial effect of the present invention is: (1), the present invention generator that distorts adopts the structure that removably connects between flow-disturbing rod and rotating disc, thereby can produce the high-order rotational distortion of different circumferentially scopes, different disturbance group number, can adapt to all kinds of experiment demands; (2), by changing the thickness of flow-disturbing rod, can control the intensity of rotating inlet distortion; (3), by rotating disc, arrange dismountable counter weight device regulate distortion generator static balancing, distortion generator of the present invention can be worked under higher rotating speed.
Accompanying drawing explanation
Fig. 1 is turbulence bar structure schematic diagram in the present invention, and in figure, (a) is that plan view, (b) are plan view;
Fig. 2 is rotary disk structure schematic diagram in the present invention, and in figure, (a) is that sectional view, (b) are plan view, 1-boss, 2-tapped hole, 3-slide rail, 4-counterweight tapped hole, 5-lightening hole;
Fig. 3 is plug schematic diagram in the present invention, and in figure, (a) is that plan view, (b) are plan view;
Fig. 4 is balancing weight schematic diagram in the present invention, and in figure, (a) is that plan view, (b) are that plan view, (c) are left view;
Fig. 5 is the first slide block schematic diagram in the present invention, and in figure, (a) is that plan view, (b) are that plan view, (c) are left view;
Fig. 6 is the second slide block schematic diagram in the present invention, and in figure, (a) is that plan view, (b) are that plan view, (c) are left view;
Fig. 7 is the sector change schematic diagram that distorts in the present invention;
Fig. 8 is the disturbance group number change schematic diagram that distorts in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be described further.
The detachable flow-disturbing bar type of the present invention high-order rotational distortion generator is made up of rotating disc, some flow-disturbing rods, plug, balance slide block, balancing weight and drive motor.
As shown in Figure 1, flow-disturbing rod is divided into two sections, and left half section be active section in Fig. 1 (b), and air flow stream produces low pressure area later, and in Fig. 1 (b), half section, the right side is linkage section, comprises tapped hole for connecting and the boss of location.The active section cross section of flow-disturbing rod is circular, and its diameter is 8mm, and the diameter that changes active section can change the intensity of rotating inlet distortion.
As shown in Fig. 2 (a), Fig. 2 (b), rotating disc is for driving the rotation of flow-disturbing rod.When design rotating disc, the diameter of rotating disc is definite according to compressor air inlet machine internal diameter of the pipeline, and the thickness of rotating disc is determined according to requirement of strength.Rotating disc comprises inner ring, centre circle, outer ring, and wherein inner ring is the boss 1 for being connected with motor shaft, has keyway and the screw for axial restraint in boss 1.The centre circle of rotating disc is provided with the slide rail 3 distributing along circumferentially, and slide rail 3 horizontal position are symmetrical arranged two gap, and for placing balance slide block, balance slide block can be free to slide and fix along slide rail 3, to realize the statically balanced fine setting of rotating disc; Between the outside of slide rail 3 and the outer ring of rotating disc, be provided with multipair counterweight tapped hole 4, for being connected and fixed balancing weight, to realize the statically balanced coarse adjustment of rotating disc.Quantity, the particular location of balance slide block and balancing weight can need to be adjusted according to real balance.On the outer ring of rotating disc, have several tapped holes 2, for connecting flow-disturbing rod, for 2 of intensity tapped holes that guarantee rotating disc should maintain a certain distance.For alleviating rotating disc weight, between the inner ring and centre circle of rotating disc, (to rotate core place) and have multiple lightening holes 5, its quantity of lightening hole also can increase and decrease according to actual needs.Uniform 49 tapped holes 2 of the upper half-turn of rotating disc outer ring in the present embodiment, uniform 3 tapped holes 2 of lower branch; Counterweight tapped hole 4 is 4 pairs, is evenly distributed on the lower branch of rotating disc; Lightening hole 5 is 4.
In the time that the circumferential tapped hole 2 in rotating disc outer ring is not installed flow-disturbing rod, for preventing that air-flow from leaking and need to tapped hole 2 be blocked by plug from tapped hole 2.Shown in as shown in Fig. 3 (a), Fig. 3 (b), plug is identical with the linkage segment structure of flow-disturbing rod, when use, plug is inserted to the rear fastening nut of tapped hole 2 of rotating disc outer ring and fix, the counter sink for locating on tapped hole 2 is is just filled and led up in its upper end.
Shown in as shown in Fig. 4 (a), Fig. 4 (b), Fig. 4 (c), balancing weight is for coarse adjustment static balancing, its upper and lower two circular arcs are stuck on rotating disc centre circle between slide rail and rotating disc outer ring, use the screw-nut of two M6 to be fixed on counterweight tapped hole.The balance slide block that the present invention distorts in generator is for statically balanced fine setting, total upper and lower two, comprise the first slide block, as shown in Fig. 5 (a), Fig. 5 (b), Fig. 5 (c), with the second slide block, as shown in Fig. 6 (a), Fig. 6 (b), Fig. 6 (c).The second slide block sinks in the slide rail of rotating disc centre circle, and the first slide block set can be fixed on the second slide block and with nut screwing clamping.The maximum speed 1500r/min of the distortion Generator Design in this example, rotating speed is lower, and resiliently deformable can ignore, and equilibrium problem belongs to the balance of stiffness rotor, can utilize that force system in equilibrium is theoretical to be solved.Rotor radial dimension D=540mm, axial dimension b=30mm, footpath is wide than D/b=18, wide than the stiffness rotor of D/b >=5 for footpath, because its axial dimension is less, can think approx that its mass distribution is in same plane of rotation, as long as realize static balancing.
As shown in Figure 7, three kinds of distortion that structure can be used for respectively producing 180 °, 90 ° and 30 ° circumferential scopes from left to right in figure.Take the situations of 180 ° as example: when air-flow with certain speed flow through flow-disturbing rod, can produce thereafter a low pressure area; Very intensive because flow-disturbing rod distributes, 49 low pressure areas that 49 flow-disturbing rods produce can mutual blending, finally forms the low pressure area of the circumferential 180 ° of scopes of covering, i.e. 180 ° of circumferential distortions.The situation of 90 ° and 30 ° similarly.Adopt in this way, this distortion generator can be simulated 0 ° ~ 180 ° (degree of regulation is 3.75 °) circumferentially single group distortion of scope, produces corresponding square wave type pressure distribution at its downstream compressor inlet.
As shown in Figure 8, in figure, four kinds of structures are respectively the high-order rotational distortion for generation of single group, two group, four and eight from left to right.Because the distribution of flow-disturbing rod is sparse, interval is very large, each flow-disturbing rod of airflow passes produces fully blending of low pressure area, causes producing multiple low pressure areas at downstream compressor inlet i.e. high-order rotational distortion.
The inlet distortion that the present invention produces belongs to circumferential inlet distortion.It can be used for producing circumferentially single group distortion of scopes of difference, shows as intake condition and is square wave type distribution, each rank Fourier series sum that this distribution is circumferential coordinate along circumferential Fourier expansion; Also can be used for producing the circumferential distortion with multiple disturbances group number, intake condition mainly comprises the higher order term of circumferential coordinate, i.e. high-order rotational distortion along circumferential Fourier expansion.Detachable flow-disturbing bar type rotational distortion generator of the present invention, can be directly used in rotating inlet aberration test, and related gas compressor is axial-flow compressor; Its flow-disturbing rod is realized and being removably connected by screw thread with rotating disc, and air flow stream is crossed flow-disturbing rod can produce low pressure area.Driven by motor rotating disc produces the pressure waveform of square wave form, can change easily circumferential scope and the disturbance group number of rotating inlet distortion by dismounting flow-disturbing rod, the thickness that changes flow-disturbing rod can change the intensity of rotating inlet distortion, the rotating speed that changes motor can change the rotating speed of inlet distortion and turn to turning to, and has realized the requirement of simulating all kinds of rotating inlets distortion at compressor inlet.Rotating disc regulates the static balancing of distortion generator by balancing weight and balance slide block, this distortion generator can be worked under higher rotating speed.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, can also make under the premise without departing from the principles of the invention some improvement, and these improve and also should be considered as protection scope of the present invention.
Claims (8)
1. a detachable flow-disturbing bar type high-order rotational distortion generator, comprise rotating disc, some flow-disturbing rods, Equilibrator and drive motor, the inner ring of described rotating disc is the boss being connected with drive motor, described Equilibrator is arranged on the centre circle of rotating disc, it is characterized in that: the outer ring of described rotating disc is provided with several tapped holes, described some flow-disturbing rods are arranged on tapped hole with removably.
2. detachable flow-disturbing bar type high-order rotational distortion generator according to claim 1, is characterized in that: described flow-disturbing rod comprises active section and linkage section, and described linkage section is provided with for the screw thread in connecting thread hole and the boss of location.
3. detachable flow-disturbing bar type high-order rotational distortion generator according to claim 2, is characterized in that: the active section cross section of described flow-disturbing rod is for circular.
4. according to the detachable flow-disturbing bar type high-order rotational distortion generator described in claims 1 to 3 any one, it is characterized in that: described Equilibrator comprises balance slide block and balancing weight, described balance slide block is arranged on rotating disc centre circle along in the slide rail circumferentially distributing, and described balancing weight is arranged on the counterweight tapped hole between slide rail outside and the outer ring of rotating disc.
5. detachable flow-disturbing bar type high-order rotational distortion generator according to claim 4, is characterized in that: described balance slide block comprises the first slide block and the second slide block, and the second slide block is placed in slide rail, and the first slide block socket is fixed on the second slide block.
6. according to the detachable flow-disturbing bar type high-order rotational distortion generator described in claims 1 to 3 any one, it is characterized in that: between the inner ring of described rotating disc and centre circle, be provided with several lightening holes.
7. according to the detachable flow-disturbing bar type high-order rotational distortion generator described in claims 1 to 3 any one, it is characterized in that: also comprise with removably and be arranged on the plug on the tapped hole of rotating disc outer ring.
8. detachable flow-disturbing bar type high-order rotational distortion generator according to claim 7, is characterized in that: described plug is identical with the linkage segment structure of flow-disturbing rod.
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| CN201410080218.2A CN103835984B (en) | 2014-03-06 | 2014-03-06 | Detachable flow-disturbing bar type high-order rotational distortion generator |
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| CN201410080218.2A CN103835984B (en) | 2014-03-06 | 2014-03-06 | Detachable flow-disturbing bar type high-order rotational distortion generator |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748965A (en) * | 2015-04-09 | 2015-07-01 | 华北电力大学（保定） | Fault simulation test-bed and method for rolling bearing combinations |
| CN106153346A (en) * | 2016-07-20 | 2016-11-23 | 南京航天航空大学 | A kind of inflatable vane type swirl flow distortion generator and method for generation |
| CN106289784A (en) * | 2016-08-02 | 2017-01-04 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of inlet distortion stagnation pressure rake structure |
| CN107505138A (en) * | 2017-09-11 | 2017-12-22 | 南京航空航天大学 | A kind of complicated distortion generator for Compressor Stability experiment |
| CN110779726A (en) * | 2018-07-30 | 2020-02-11 | 中国航发商用航空发动机有限责任公司 | Fluid pressure distortion simulation device |
| CN112179659A (en) * | 2020-08-17 | 2021-01-05 | 南京航空航天大学 | Adjustable residual rotation distortion generating device based on memory alloy |
| CN112284751A (en) * | 2020-10-16 | 2021-01-29 | 中国航发四川燃气涡轮研究院 | Distortion test device with adjustable distortion characteristic |
| CN113567141A (en) * | 2020-04-28 | 2021-10-29 | 中国航发商用航空发动机有限责任公司 | Distortion generating device and simulation method thereof and pressure distortion characteristic test system |
| CN115452388A (en) * | 2022-10-17 | 2022-12-09 | 北京航空航天大学 | Distortion index proportion adjustable total pressure distortion generator, flow field experimental apparatus |
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Cited By (15)
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| CN104748965B (en) * | 2015-04-09 | 2020-06-19 | 华北电力大学（保定） | Method for simulating bearing combination fault by rolling bearing combination fault simulation experiment table |
| CN104748965A (en) * | 2015-04-09 | 2015-07-01 | 华北电力大学（保定） | Fault simulation test-bed and method for rolling bearing combinations |
| CN106153346A (en) * | 2016-07-20 | 2016-11-23 | 南京航天航空大学 | A kind of inflatable vane type swirl flow distortion generator and method for generation |
| CN106153346B (en) * | 2016-07-20 | 2019-07-19 | 南京航空航天大学 | A kind of inflatable vane type swirl flow distortion generator and method for generation |
| CN106289784A (en) * | 2016-08-02 | 2017-01-04 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of inlet distortion stagnation pressure rake structure |
| CN107505138A (en) * | 2017-09-11 | 2017-12-22 | 南京航空航天大学 | A kind of complicated distortion generator for Compressor Stability experiment |
| CN107505138B (en) * | 2017-09-11 | 2019-05-14 | 南京航空航天大学 | A kind of complicated distortion generator for Compressor Stability test |
| CN110779726A (en) * | 2018-07-30 | 2020-02-11 | 中国航发商用航空发动机有限责任公司 | Fluid pressure distortion simulation device |
| CN113567141A (en) * | 2020-04-28 | 2021-10-29 | 中国航发商用航空发动机有限责任公司 | Distortion generating device and simulation method thereof and pressure distortion characteristic test system |
| CN113567141B (en) * | 2020-04-28 | 2024-02-02 | 中国航发商用航空发动机有限责任公司 | Distortion generating device, simulation method thereof and pressure distortion characteristic test system |
| CN112179659A (en) * | 2020-08-17 | 2021-01-05 | 南京航空航天大学 | Adjustable residual rotation distortion generating device based on memory alloy |
| CN112179659B (en) * | 2020-08-17 | 2021-08-06 | 南京航空航天大学 | Adjustable residual rotation distortion generating device based on memory alloy |
| CN112284751A (en) * | 2020-10-16 | 2021-01-29 | 中国航发四川燃气涡轮研究院 | Distortion test device with adjustable distortion characteristic |
| CN115452388A (en) * | 2022-10-17 | 2022-12-09 | 北京航空航天大学 | Distortion index proportion adjustable total pressure distortion generator, flow field experimental apparatus |
| CN115452388B (en) * | 2022-10-17 | 2024-08-27 | 北京航空航天大学 | Total pressure distortion generator with adjustable distortion index proportion and flow field experimental device |
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